Can't root my device, not even with hiden butten **resolved**

can't flash any rom or any *.zip E:can't open /sdcard/update.zip (bad)
i had image 1.2.2 ra.
tryed to flash 1.5.2 thru recovery flasher, couldnt do,(also couldnt backup) it didnt flash even with the hidden butten.
so i flashed 1.5.2 thru adb shell flash_image recovery /sdcard/Recovery-RA-HERO-v1.5.2.img.
then i try to flash update.zip or any other zip, and i get that error.
any help?
thnx

i flashed an original rom 2.73.405.38 and now when i press power + home it show the tringel instead of the recovery console, i tryed now to flash cm-hero-recovery img and it wont let me, either the 1.5.2.
trying to have su it say permision denied.
remount not permited. thru adb.

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